1/*-
2 * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the
12 * next paragraph) shall be included in all copies or substantial portions
13 * of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S), AND/OR THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Author: Thomas Hellstrom 2005.
24 *
25 * Video and XvMC related functions.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: releng/10.2/sys/dev/drm/via_video.c 207318 2010-04-28 10:33:41Z rnoland $");
30
31#include "dev/drm/drmP.h"
32#include "dev/drm/via_drm.h"
33#include "dev/drm/via_drv.h"
34
35void via_init_futex(drm_via_private_t * dev_priv)
36{
37	unsigned int i;
38
39	DRM_DEBUG("\n");
40
41	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
42		DRM_INIT_WAITQUEUE(&(dev_priv->decoder_queue[i]));
43		XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
44	}
45}
46
47void via_cleanup_futex(drm_via_private_t * dev_priv)
48{
49}
50
51void via_release_futex(drm_via_private_t * dev_priv, int context)
52{
53	unsigned int i;
54	volatile int *lock;
55
56	if (!dev_priv->sarea_priv)
57		return;
58
59	for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
60		lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
61		if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
62			if (_DRM_LOCK_IS_HELD(*lock)
63			    && (*lock & _DRM_LOCK_CONT)) {
64				DRM_WAKEUP(&(dev_priv->decoder_queue[i]));
65			}
66			*lock = 0;
67		}
68	}
69}
70
71int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
72{
73	drm_via_futex_t *fx = data;
74	volatile int *lock;
75	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
76	drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
77	int ret = 0;
78
79	DRM_DEBUG("\n");
80
81	if (fx->lock >= VIA_NR_XVMC_LOCKS)
82		return -EFAULT;
83
84	lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
85
86	switch (fx->func) {
87	case VIA_FUTEX_WAIT:
88		DRM_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
89			    (fx->ms / 10) * (DRM_HZ / 100), *lock != fx->val);
90		return ret;
91	case VIA_FUTEX_WAKE:
92		DRM_WAKEUP(&(dev_priv->decoder_queue[fx->lock]));
93		return 0;
94	}
95	return 0;
96}
97